Cartridge for cleaning well-strainers.



V. H. NICKERSON.

CARTRIDGE FOR CLEANING WELL STRAINERS.

APPLICATION FILED JUNE 5. 1911.

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Specification of Letters Patent.

Application filed. June 5, 1917. Serial a... 172,898

To all whom it may concern:

Be it known that I, Vromn H. .Nrcxnnson, a citizen of the United States, and a resident of Cotuit, in the county of Barnstable and State of Massachusetts, have invented a new and Improved Cartridge for Cleaning Well-Strainers, of which the following is a ingte full clear, and exact descri tion.

My invention has for its 0 ect to provide a cartrid for cleaning'well strainers which may be owered in a driven well point or strainer while in the ground and 'be ex-, ploded to clean the strainer, which may have become clogged while in use.

Additional objects of the invention will appear in the following specification, in which the preferred form of the invention'is disclosed. In the drawings similar reference characters denote similar parts-in all the views, in

Fi re 1 is a sectional elevation illustratstrainer;

F' 2 is an enlarged sectional view showt e cartridge illustrated in Fig. ,1;

ig. 3 is a sectional view on the line 33 of Fig. 2, Y

Fig. 4 1s a sectional view on the line 4-4 of Fig. 2;

Fig. 5 is a sectional view on the line 55 of Fig. 2; and 7 Figs. 6 and 7 are sectional views illustrating modified forms of the invention.

By referring to the drawings, it will be seen that a cartridge 10 is lowered in the well lining 11 to a position at the strainer 12, the cartridge 10 being constructed of a tube 13 through which a wire' 14 is disposed, the said wire 14 being insulated except at one position 15' from which leads a terminal 16 which forms a spark gap with the tube 13 which is constructed 0 trical conducting material. The ends of the tube 13 are closed by plugs have orifices 18 through which the wire 14 is disposed, the plugs 17 fitting snugly 9 around the wire and against the ends of the tube 13 to revent water from entering the tube and dhmagin he explosive 19 disosed within the tube. The wire 14 extends low the tube 13 and to the lower end of the wire there is secured a weight 20 the diameter of which is greater than the inner.

diameter of the tube 13. It will be understood that the cartridge position of my cartridge in a well an elec- 17 which.

ma be lowered into the well to position at the strainer 12 by means of the wire 14;

that the explosive 19 may be fired by passmg a current through the wire 14 which will ump the spark gap to the tube 13, the said tube 13 being disposed in the water,

which forms a conductor between the tube 13 and the strainer 12, which isconnected with the lining 11 in the manner set forth.

When the explosive 19, which should be of Patented Aug.13,1918.

When the (plugs 17 have been blown out, as l 1 stated, an the strainer has been cleaned, it is possible to remove the tube 13 from the well by drawing upwardly on the wire 14, the we1ght 2O engaging the end of the tube 13, in a manner readily understood.

In the form of the invention illustrated in Fig. 6 of the drawings,'the explosive 22 1s contained in a paper tube 23 which is 'shellacked or otherwise coated to prevent the explosive within the tube from becoming damaged by the water in the well. The

ends of the paper tube 23 are-secured around brassend pieces 24 in which rubber packing 25 is disposed. The outer ends of the end pieces 24 have mner threads 26. An outer screw 27 on a plug 28 meshes with one of the inner threads 26 to hold the'packing 25 in position,-the plug 28 and the said'pack ing 25 having orifices'29 and 30 respectively, through which a wire 31 is secured to the other packing 25,.the said other packing 25 being held in position by a screw member 32 which meshes with the inner thread 33 in the said brass end member 24.

It will be understood that when this form of the invention is used, the cartridge may be lowered in the well by the wire'31 and may be fired by passing-a current through the wire 31, the said current jumping the gap to the terminal 35 and passing through 36 is employed in the lower end of which a weight 37 is disposed, the explosive 38 being disposed in the tube 36 above the weight.

37, 'andthe top of the tube 36 being closed by the plug 39. There is an orifice '40 in the plug 39 through which a wire4l is di posed,

this, wire 41 having a terminal 42 in the tube 36 which is disposed adjacent terminal 43 on a conductor 44; which is in electrical contact with the tube 36, the said tube being constructed of electrical conducting matenal.

Secured to the side of the tube 36 there is a member 45 havin an opening .46 through which the wire 41 extends, the wire 41 bemg gripped by the'member 45 at its orifice 46 so that after the ex losive 38 has been fired in a; manner readi y understood, and the plug 39 has been blown from the tube 36,

the wire 41 will still be secured to permit of the raising of the tube 36 when the wire 41 is drawn from the well.

Having thus, described my invention, I claim as new and desire to secure by' Letters Patent; I v

1. In a cartridge for cleaning well strainers, a, tube having awall serving as an with theinterior of the tube, a conductor connected with the wall, an explosive in the tube, a wire secured to the tube and extending therein to form a spark gap with the last conductor, the wire serving to lower the tube in a well and to remove the tube after the explosive has been fired .to clean the strainer in the well.

ers, a tube having a wall serving as an electric conductor connecting the exterior with the interior of the tube, a conductor connected with the wall, an explosive in the :5 tube, a plug in the end of the tube which will be blown out when the explosive is fired, a extending within the tube to form a spark gap. with the last conductor, the wire serving to lower the tube into a well and t0 fired and the plug hasbeen blown from the .tube.

2. In a cartridge for cleaning well strainremove the tube after the explosive has been 3. In a cartridge for cleaning well strainers, a tube having a wall serving as an electric conductor connecting the exterior with the interior of the tube, a conductor connected with the wall, an explosive in the tube, a portion of the tube being constructed to open to free the gases when th'e'exploswe is fired, and a wire extending into the tube to forma spark gap with the last conductor,

the wire serving to lower the tube in a well and to remove the tube after the explosive has been fired to clean the strainer in the well."

ers a tube having a wall serving as an e 4. In a cartridge for cleaning well strain electric conductor connecting the exterior with the interior of the tube and an extending member with an orifice, a wei htsecured to the tube, an explosive in the tu a plug closing the upper end of the tube an having an orifice extending therethrough, a conductor secured to the plug and having contact. with said well of the tube and provided with a terminal in the tube, and a wire extending through the orifices in the extending member of the tube and in the plug and provided with a terminal forming a spark gap with-the first terminal.

5'. In a cartridge for cleaning well strainers, a tube having a wall serving as an electric conductor connecting the exterior with the interior of the tube, a weight secured to the tube, an explosive in the tube, a plug closing the upper end of the tube and having an orifice extending therethrough, a conductor secured to'theplug and havin contact-with the said wall of the tube an provided with a terminal in the tube, and a wire extending throu h the orifice in the plug and prov ded wit a terminal forming a spark gap with the first terminal.

VICTOR HALL NICKERSON. 

